Question

a long muscle that extends the fingers, the extensor digitorum muscle, has all of the muscle cells on the same side of the tendon. this is known as which type of skeletal muscle organization? unipennate bipennate parallel multipennate i dont know yet

Explanation:

In unipennate skeletal - muscle organization, all muscle cells are on the same side of the tendon. The extensor digitorum muscle with this characteristic is an example of unipennate organization. Bipennate has muscle cells on both sides of the tendon, parallel has fibers running parallel to the long - axis of the muscle, and multipennate has a more complex arrangement with multiple tendons and fiber orientations.

Answer:

A. Unipennate